Publications

Publications

Ballistic impact of a KEVLAR helmet: Experiment and simulations

By integrating light-gas gun experiments with AUTODYN-3Ds hydrocode simulations, this work elucidates the impact biomechanics of a KEVLAR® helmet, achieving close agreement in deformation metrics (impression diameter, penetration depth) at 205 m/s. The validated orthotropic material model then accurately predicts V₅₀ ballistic limits against military-spec fragment and 9 mm projectiles, emphasizing the influence of stress-wave dynamics, anisotropic failure, and helmet geometry.

A Theoretical Model of the Effect of Bone Defects on Anterior Shoulder Instability

Piyush Walia

This paper investigates the biomechanical impact of combined glenohumeral bone defects on anterior shoulder instability using a finite element model. The study demonstrates that combined defects significantly reduce joint stability more than isolated ones, providing crucial insights into the mechanisms of recurrent dislocation. This advanced computational biomechanics research informs improved surgical strategies for shoulder instability.

The Capsule's Contribution to Total Hip Construct Stability- A Finite Element Analysis

This paper uses a biomechanical finite element analysis to investigate the hip capsule's critical contribution to total hip construct stability, particularly in the context of total hip arthroplasty. The validated model explores how capsule compromise and surgical repairs affect joint stability, providing crucial insights for optimizing surgical techniques. This research aids in reducing post-operative instability by improving understanding of hip biomechanics.

Biomechanics of failure modalities in total hip arthroplasty

Jacob M. Elkins

This thesis presents an anatomically grounded, capsule-inclusive finite‐element hip model to investigate four major THA failure modes—dislocation, impingement, ceramic fracture, and metal-on-metal wear—demonstrating how soft-tissue integrity, implant geometry, patient factors (e.g., obesity, head size), and loading conditions govern stresses, micromotion, and failure thresholds to guide optimal implant design and orientation.

Mechanical trade-offs in changing centers of rotation for reverse shoulder arthroplasty design

Vijay Niels Permeswaran

The paper uses advanced finite element modeling to analyze biomechanical trade-offs arising from shifting the center of rotation in reverse shoulder arthroplasty. Findings highlight that implant lateralization improves range of motion but also increases deltoid muscle forces, emphasizing the importance of balancing mechanical factors to optimize patient outcomes.